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mbuf: improve tunnel Tx offloads API doc

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Add few details to remind TSO flag, checksum flags and header lengths.

The doxygen syntax for MPLS-in-UDP is fixed.

Fixes: d95188551f ("mbuf: introduce new Tx offload flag for MPLS-in-UDP")
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
This commit is contained in:
Thomas Monjalon 2018-04-20 01:53:10 +02:00
parent f00dcb7b0a
commit ab66fe0e4a
1 changed files with 6 additions and 3 deletions
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9
lib/librte_mbuf/rte_mbuf.h
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@ -201,14 +201,17 @@ extern "C" {
/**
* Bits 45:48 used for the tunnel type.
* When doing Tx offload like TSO or checksum, the HW needs to configure the
* tunnel type into the HW descriptors.
* The tunnel type must be specified for TSO or checksum on the inner part
* of tunnel packets.
* These flags can be used with PKT_TX_TCP_SEG for TSO, or PKT_TX_xxx_CKSUM.
* The mbuf fields for inner and outer header lengths are required:
* outer_l2_len, outer_l3_len, l2_len, l3_len, l4_len and tso_segsz for TSO.
*/
#define PKT_TX_TUNNEL_VXLAN (0x1ULL << 45)
#define PKT_TX_TUNNEL_GRE (0x2ULL << 45)
#define PKT_TX_TUNNEL_IPIP (0x3ULL << 45)
#define PKT_TX_TUNNEL_GENEVE (0x4ULL << 45)
/**< TX packet with MPLS-in-UDP RFC 7510 header. */
/** TX packet with MPLS-in-UDP RFC 7510 header. */
#define PKT_TX_TUNNEL_MPLSINUDP (0x5ULL << 45)
/* add new TX TUNNEL type here */
#define PKT_TX_TUNNEL_MASK (0xFULL << 45)